I honestly have the same fear right now, which is why I'm still waiting on the game. Seeing people talk it up as a resurgence of old-school JRPGs, having a great demo, and bragging mostly about the artstyle and combat gives me pretty bad Bravely PTSD. Yeah I know it's a different team and all...but I'm still hesitant about making the same mistake three times (yeah I decided to try Second too...was better than the first but not by much).
Still...I'm not completely attached to my bias...if people start completing the game and still feel the same positivity, I'll probably give it a shot. Though with my RPG backlog this year...I'm not really in a hurry either.
NNID: Zephyr25 / PSN: Zephyr--25 / Switch: SW-4450-3680-7334